Detection of corrosion fatigue cracks in membrane boiler tubes
US5526691A · kind A · utility
66Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1995 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Aug 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2695
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting corrosion fatigue cracks in membraned boiler tubes in a membrane tube panel employs at least one EMAT coil generating ultrasonic SH shear waves at a predetermined beam angle. The method of the present invention provides better signal-to-noise ratios than conventional ultrasonic techniques as well as not requiring any couplant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.